The performance requirement for secure transactions is the
same as the performance requirement for non-secure transactions.

To
account for the extra computing power to handle secure transactions, the number
of CPUs to handle these transactions will be increased by a factor of four.
As with other CPU figures in the example, this factor is arbitrary and is
for illustration purposes only.

Calculate additional CPU estimates for secure transactions. Assume secure
transactions require four times the CPU power as nonsecure transactions.

Ten percent of the baseline estimate require secure transport:

0.10 x 4 CPUs = 0.4 CPUs

Increase CPU power for secure transactions by a factor of four:

4 x 0.4 = 1.6 CPUs

1.6 CPUs

3

Calculate reduced CPU estimates for nonsecure transactions.

Ninety percent of the baseline estimate are non-secure:

0.9 x 4 CPUs = 3.6 CPUs

3.6 CPUs

4

Calculate adjusted total CPU estimates for secure and nonsecure transactions.

Secure estimate + non-secure estimate = total:

1.6 CPUs + 3.6 CPUs = 5.2 CPUs

5.2 CPUs

5

Round up to even number.

5.2 CPUs ==> 6 CPUs

6 CPUs

From the calculations for secure transactions in this example, you would
modify the total CPU estimates in CPU Estimates for Secure Transactions by adding an additional two CPUs and four gigabytes
of memory to get the following total for Portal Server.